Chin. Phys. Lett.  2013, Vol. 30 Issue (9): 096102    DOI: 10.1088/0256-307X/30/9/096102
CONDENSED MATTER: STRUCTURE, MECHANICAL AND THERMAL PROPERTIES |
Electronic Band Structure of Carbon Nanotubes with Kekule Structure
Nguyen Ngoc Hieu1**, Le Cong Nhan2
1Center of Research and Development, Duy Tan University, K7/25 Quang Trung, Da Nang, Viet Nam
2Department of Environmental Science, Saigon University, 273 An Duong Vuong, Ho Chi Minh city, Viet Nam
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Nguyen Ngoc Hieu, Le Cong Nhan 2013 Chin. Phys. Lett. 30 096102
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Abstract Electronic band structure of carbon nanotubes with the Kekule structure is studied by the tight-binding approximation. We give a complete geometrical approach to structural properties of carbon nanotubes with bond alternation, including chiral and achiral tubes. When the Kekule is introduced, all carbon nanotubes become semiconducting with a small band gap at the Fermi level. The band gap of the carbon nanotubes depends only on the difference between C–C bond lengths or the resonance integrals.
Received: 03 May 2013      Published: 21 November 2013
PACS:  61.48.De (Structure of carbon nanotubes, boron nanotubes, and other related systems)  
  31.15.aq (Strongly correlated electron systems: generalized tight-binding method)  
  61.50.Lt (Crystal binding; cohesive energy)  
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https://cpl.iphy.ac.cn/10.1088/0256-307X/30/9/096102       OR      https://cpl.iphy.ac.cn/Y2013/V30/I9/096102
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Nguyen Ngoc Hieu
Le Cong Nhan
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